package chapter04.Example15;
class Animal {
    public void shout() {
        System.out.println("喵喵喵....");
    }
}
class Dog extends Animal {
    public void shout() {
        System.out.println("汪汪.....");
    }

    public void eat() {
        System.out.println("吃骨头.....");
    }
}
public class Example15 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        Animal ai=dog;
        ai.shout();
    }
    }

